LXR linux/arch/s390/kernel/vdso64/vdso64.lds.S

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * This is the infamous ld script for the 64 bits vdso
   4 * library
   5 */
   6
   7#include <asm/page.h>
   8#include <asm/vdso.h>
   9
  10OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
  11OUTPUT_ARCH(s390:64-bit)
  12ENTRY(_start)
  13
  14SECTIONS
  15{
  16        . = VDSO64_LBASE + SIZEOF_HEADERS;
  17
  18        .hash           : { *(.hash) }                  :text
  19        .gnu.hash       : { *(.gnu.hash) }
  20        .dynsym         : { *(.dynsym) }
  21        .dynstr         : { *(.dynstr) }
  22        .gnu.version    : { *(.gnu.version) }
  23        .gnu.version_d  : { *(.gnu.version_d) }
  24        .gnu.version_r  : { *(.gnu.version_r) }
  25
  26        .note           : { *(.note.*) }                :text   :note
  27
  28        . = ALIGN(16);
  29        .text           : {
  30                *(.text .stub .text.* .gnu.linkonce.t.*)
  31        } :text
  32        PROVIDE(__etext = .);
  33        PROVIDE(_etext = .);
  34        PROVIDE(etext = .);
  35
  36        /*
  37         * Other stuff is appended to the text segment:
  38         */
  39        .rodata         : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
  40        .rodata1        : { *(.rodata1) }
  41
  42        .dynamic        : { *(.dynamic) }               :text   :dynamic
  43
  44        .eh_frame_hdr   : { *(.eh_frame_hdr) }          :text   :eh_frame_hdr
  45        .eh_frame       : { KEEP (*(.eh_frame)) }       :text
  46        .gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) }
  47
  48        .rela.dyn ALIGN(8) : { *(.rela.dyn) }
  49        .got ALIGN(8)   : { *(.got .toc) }
  50
  51        _end = .;
  52        PROVIDE(end = .);
  53
  54        /*
  55         * Stabs debugging sections are here too.
  56         */
  57        .stab          0 : { *(.stab) }
  58        .stabstr       0 : { *(.stabstr) }
  59        .stab.excl     0 : { *(.stab.excl) }
  60        .stab.exclstr  0 : { *(.stab.exclstr) }
  61        .stab.index    0 : { *(.stab.index) }
  62        .stab.indexstr 0 : { *(.stab.indexstr) }
  63        .comment       0 : { *(.comment) }
  64
  65        /*
  66         * DWARF debug sections.
  67         * Symbols in the DWARF debugging sections are relative to the
  68         * beginning of the section so we begin them at 0.
  69         */
  70        /* DWARF 1 */
  71        .debug          0 : { *(.debug) }
  72        .line           0 : { *(.line) }
  73        /* GNU DWARF 1 extensions */
  74        .debug_srcinfo  0 : { *(.debug_srcinfo) }
  75        .debug_sfnames  0 : { *(.debug_sfnames) }
  76        /* DWARF 1.1 and DWARF 2 */
  77        .debug_aranges  0 : { *(.debug_aranges) }
  78        .debug_pubnames 0 : { *(.debug_pubnames) }
  79        /* DWARF 2 */
  80        .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
  81        .debug_abbrev   0 : { *(.debug_abbrev) }
  82        .debug_line     0 : { *(.debug_line) }
  83        .debug_frame    0 : { *(.debug_frame) }
  84        .debug_str      0 : { *(.debug_str) }
  85        .debug_loc      0 : { *(.debug_loc) }
  86        .debug_macinfo  0 : { *(.debug_macinfo) }
  87        /* SGI/MIPS DWARF 2 extensions */
  88        .debug_weaknames 0 : { *(.debug_weaknames) }
  89        .debug_funcnames 0 : { *(.debug_funcnames) }
  90        .debug_typenames 0 : { *(.debug_typenames) }
  91        .debug_varnames  0 : { *(.debug_varnames) }
  92        /* DWARF 3 */
  93        .debug_pubtypes 0 : { *(.debug_pubtypes) }
  94        .debug_ranges   0 : { *(.debug_ranges) }
  95        .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
  96
  97        . = ALIGN(PAGE_SIZE);
  98        PROVIDE(_vdso_data = .);
  99
 100        /DISCARD/       : {
 101                *(.note.GNU-stack)
 102                *(.branch_lt)
 103                *(.data .data.* .gnu.linkonce.d.* .sdata*)
 104                *(.bss .sbss .dynbss .dynsbss)
 105        }
 106}
 107
 108/*
 109 * Very old versions of ld do not recognize this name token; use the constant.
 110 */
 111#define PT_GNU_EH_FRAME 0x6474e550
 112
 113/*
 114 * We must supply the ELF program headers explicitly to get just one
 115 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
 116 */
 117PHDRS
 118{
 119        text            PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
 120        dynamic         PT_DYNAMIC FLAGS(4);            /* PF_R */
 121        note            PT_NOTE FLAGS(4);               /* PF_R */
 122        eh_frame_hdr    PT_GNU_EH_FRAME;
 123}
 124
 125/*
 126 * This controls what symbols we export from the DSO.
 127 */
 128VERSION
 129{
 130        VDSO_VERSION_STRING {
 131        global:
 132                /*
 133                 * Has to be there for the kernel to find
 134                 */
 135                __kernel_gettimeofday;
 136                __kernel_clock_gettime;
 137                __kernel_clock_getres;
 138                __kernel_getcpu;
 139
 140        local: *;
 141        };
 142}
 143